公开(公告)号：US20210098142A1

公开(公告)日：2021-04-01

申请号：US17024208

申请日：2020-09-17

申请人： Hitachi-GE Nuclear Energy, Ltd.

发明人： Hideyuki HOSOKAWA ,  Tsuyoshi ITO ,  Hiroko SUKEDA ,  Mayu SASAKI ,  Naoshi USUI

IPC分类号： G21C15/28 ,  G21C1/02 ,  G21C17/10 ,  G06K9/62 ,  G06N20/00

摘要： A reactor water radioactivity concentration of a nuclear power plant can be predicted with high accuracy. First, a plant state quantity prediction value is calculated by using a physical model that describes plant state quantities of the power plant including a flow rate of feedwater and a metal corrosion product concentration in feedwater of the reactor water is calculated. Next, data for supervised learning is created, and the data for supervised learning includes the previously calculated plant state quantity prediction value and a plant state quantity such as the flow rate of feedwater, the metal corrosion product concentration in feedwater, a metal corrosion product concentration in reactor water, and a radioactive metal corrosion concentration of the reactor water in the reactor as input data and includes a radioactive metal corrosion concentration in the reactor water which is an actual measured value as output data, and a predictive model is trained.

公开(公告)号：US20220139587A1

公开(公告)日：2022-05-05

申请号：US17512591

申请日：2021-10-27

申请人： Hitachi-GE Nuclear Energy, Ltd.

发明人： Sohei FUKUI ,  Kazushige ISHIDA ,  Tsuyoshi ITO ,  Kazuo TOMINAGA ,  Motoi TANAKA ,  Masaaki TANAKA

IPC分类号： G21F9/02 ,  B01D53/70 ,  B01D53/78 ,  G21C19/303

摘要： To provide an iodine trapping apparatus capable of trapping organic iodine in a wide temperature range with high efficiency. The iodine trapping apparatus includes a first trapping agent 2 capable of trapping organic iodine in a gas in a nuclear power structure main body. The first trapping agent 2 contains a generating and trapping component which generates an iodide ion (I−) from organic iodine (RI) and traps the generated iodide ion, and a generating component which is different from the generating and trapping component, generates an iodide ion from the organic iodine at least at 100° C. to 130° C., and traps the generated iodide ion in the generating and trapping component.

公开(公告)号：US20140037037A1

公开(公告)日：2014-02-06

申请号：US13679287

申请日：2012-11-16

申请人： HITACHI-GE NUCLEAR ENERGY, LTD.

发明人： Tsuyoshi ITO ,  Hideyuki HOSOKAWA ,  Makoto NAGASE ,  Yoichi WADA ,  Kazushige ISHIDA ,  Motohiro AIZAWA

IPC分类号： G21C19/32

CPC分类号： G21C19/32 ,  G21C17/0225 ,  G21D1/00 ,  G21F9/06 ,  G21F9/12 ,  G21F9/30 ,  Y02E30/40

摘要： A noble metal injection apparatus is connected to a piping of a nuclear plant at the time of stop of the nuclear plant before start of the nuclear plant. In chemical decontamination, oxidation decontamination agent decomposition, and reduction decontamination on an inner surface of the pipe system are executed. After reduction decontamination, a part of an oxalic acid included in a reduction decontamination solution is decomposed and platinum is injected into the reduction decontamination solution of pH 3.5 or higher. When the platinum concentration becomes a preset concentration, a reduction agent is injected and the reduction decontamination solution including the platinum and reduction agent is brought into contact with the inner surface of the piping. The platinum is deposited on the inner surface of the piping. The injection of the platinum and reduction agent is stopped and the platinum and reduction agent are decomposed.

摘要翻译： 贵金属注入装置在核电厂启动之前停止核电站时连接到核电厂的管道。 在化学去污中，执行氧化去污剂分解和管道内表面上的还原去污。 减压除污后，还原去污溶液中含有的一部分草酸被分解，将铂注入pH 3.5以上的还原去污溶液中。 当铂浓度变为预设浓度时，注入还原剂，并且将包含铂和还原剂的还原性去污溶液与管道的内表面接触。 铂沉积在管道的内表面上。 铂和还原剂的注入停止，铂和还原剂分解。

公开(公告)号：US20220213601A1

公开(公告)日：2022-07-07

申请号：US17143288

申请日：2021-01-07

申请人： Hitachi-GE Nuclear Energy, Ltd.

发明人： Ryo HAMADA ,  Tsuyoshi ITO ,  Hideyuki HOSOKAWA ,  Nobuyuki OTA ,  Mayu SASAKI

IPC分类号： C23C18/34 ,  C23C18/16

摘要： A film-forming apparatus is connected to a carbon steel cleanup system pipe of a BWR plant. Formic acid and hydrogen peroxide are injected into the circulation pipe of the film-forming apparatus. An iron elution accelerator aqueous solution containing 3000 ppm of formic acid and 1500 ppm of hydrogen peroxide is brought into contact with the inner surface of the cleanup system pipe, and Fe2+ is eluted from the cleanup system pipe by formic acid, and hydroxyl radicals generated from hydrogen peroxide. The film-forming aqueous solution produced from the iron elution accelerator aqueous solution by injecting the nickel formate aqueous solution is brought into contact with the inner surface of the cleanup system pipe, and the Ni ions incorporated into the inner surface by the substitution reaction are reduced by the electrons generated at the time of elution of Fe2+ to form a Ni metal film on the inner surface thereof.

公开(公告)号：US20210210231A1

公开(公告)日：2021-07-08

申请号：US17082057

申请日：2020-10-28

申请人： Hitachi-GE Nuclear Energy, Ltd.

发明人： Hiroko SUKEDA ,  Naoshi USUI ,  Mayu SASAKI ,  Hideyuki HOSOKAWA ,  Tsuyoshi ITO

IPC分类号： G21C17/022 ,  G01N33/18

摘要： More accurate prediction of reactor water quality of a nuclear reactor is implemented. A device for prediction of reactor water quality of a nuclear reactor in a nuclear power plant is disclosed. The device stores a reactor water quality prediction model which is learned using learning data, and with which future reactor water quality is predicted. An explanatory variable of the reactor water quality prediction model includes a value in a predetermined period unit that is generated from data acquired in an operating nuclear power plant. The device generates the value in a predetermined period unit from data acquired in a target operating nuclear power plant, and acquires a predicted value of the reactor water quality in the target nuclear power plant based on the reactor water quality prediction model and the value in a predetermined period unit.

公开(公告)号：US20130202791A1

公开(公告)日：2013-08-08

申请号：US13746907

申请日：2013-01-22

申请人： Hitachi-GE Nuclear Energy, Ltd.

发明人： Tsuyoshi ITO ,  Hideyuki HOSOKAWA ,  Yukio HIRAMA ,  Motoaki SAKASHITA ,  Makoto NAGASE

IPC分类号： C23C30/00

CPC分类号： C23C30/005 ,  C23C18/1651 ,  C23C18/1692 ,  C23C18/32 ,  C23C18/52 ,  G21C17/0225 ,  G21C19/28

摘要： A bath containing nickel ions and formic acid is injected into a film-forming aqueous solution flowing in a circulation pipe connected to a feed water pipe made of carbon steel in a BWR plant. This solution is supplied into the pipe through the circulation pipe, and a nickel metal film is formed on an inner surface of the pipe. After the film is formed, a film-forming aqueous solution containing iron (II) ions, formic acid, nickel ions, hydrogen peroxide, and hydrazine is supplied to the pipe. A nickel ferrite film is formed on the surface of the nickel metal film in the pipe. The nickel ferrite film comes into contact with water containing dissolved oxygen at or above 150° C. to transform the nickel metal film into a nickel ferrite film. A thick nickel ferrite film is formed on the inner surface of the feed water pipe.

摘要翻译： 将含有镍离子和甲酸的浴注入与在BWR设备中由碳钢制成的给水管连接的循环管中流动的成膜水溶液中。 该溶液通过循环管道供给到管中，并且在管的内表面上形成镍金属膜。 在形成膜之后，向管中供给含有铁（II）离子，甲酸，镍离子，过氧化氢和肼的成膜水溶液。 在管中的镍金属膜的表面上形成镍铁氧体膜。 镍铁氧体膜与等于或高于150℃的溶解氧的水接触以将镍金属膜转变成镍铁氧体膜。 在供水管的内表面上形成厚镍铁氧体膜。